posted atopic other day regarding a vibrating noise from boiler had a new fan fitted 2 weeks ago and since the boiler has ben making a loud vibrating noise only now and again,had bg out they said it were the casing vibrating nothing u can do about it,only when he took the casing off it still made the noise but only slightly and now we have 2 pipes that run down the side of the boiler but they do touch the casing and they run into the kitchen and t hey have started to make a vibrating noise when the boiler is heating up, could this be vibration of the casing answers appreciated many thanx